The SMS intervention was developed in 2 phases: (i) stakeholder consultation and (ii) technical design. Twenty-three consultation meetings were held with 78 drug store owners and attendants, 45 dispensary and health centre clinical officers and nurses, and 148 adolescents in communities. These stakeholders prioritised key deficiencies in existing RH provision and preferred strategies to address them. Detailed methods and results of these consultations are presented elsewhere (Consultation Paper in preparation). In brief government health facilities wanted an intervention that allows dispensaries and health centres to take charge of STI treatment and provide skilled service for other RH needs. Drug stores wanted an intervention that recognises and integrates their contribution to the health system, while adolescents wanted an intervention that promotes accessibility, confidentiality and trust of service providers. Through subsequent meetings, an SMS intervention strategy was identified because all clinical officers and drug store attendants demonstrated use mobile phones on a day-to-day basis.